<template>
  <div>
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="params.title" placeholder="课程名称"/>
      </el-form-item>
      <el-form-item>
        <el-select v-model="params.status" clearable placeholder="课程状态">
          <el-option :value="'Normal'" label="已发布"/>
          <el-option :value="'Draft'" label="未发布"/>
        </el-select>
      </el-form-item>
      <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>
    <!-- 表格 -->
    <el-table
      v-loading="listLoading"
      :data="list"
      element-loading-text="数据加载中"
      border
      fit
      highlight-current-row>
      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="title" label="课程名称" width="250" />
      <el-table-column label="课程状态" width="150">
        <template slot-scope="scope">
          {{ scope.row.status==='Normal'?'已发布':'未发布' }}
        </template>
      </el-table-column>
      <el-table-column prop="lessonNum" label="课时数" width="150"/>
      <el-table-column prop="gmtCreate" label="添加时间" width="200"/>
      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/info/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">修改课程信息</el-button>
          </router-link>
          <router-link :to="'/course/chapter/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">修改课程大纲</el-button>
          </router-link>
          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除课程内容</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />
  </div>
</template>

<script>
  import course from '../../../api/edu/course'
  export default {
    name: 'list',
    data() {
      return {
        listLoading: true, // 是否显示loading信息
        page: 1,//当前页
        limit: 3, //每页记录数
        list: [], //讲师数据集合
        params: {}, //请求参数
        total: 0 //总记录数
      }
    },
    created() {
      this.getList()
    },
    methods: {
      getList(page=1){
        course.getList(page,this.limit,this.params).then(res=>{
          this.list=res.data.records
          this.total=res.data.total
          this.listLoading=false
        })
      },
      resetData(){
        this.params={}
        this.getList()
      },
      removeDataById(id){
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          type: 'warning'
        }).then(() => {
          return course.deleteCourse(id)
        }).then(() => {
          this.getList() //刷新页面
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
        }).catch((response) => { // 失败
          if (response === 'cancel') {
            this.$message({
              type: 'info',
              message: '已取消删除'
            })
          } else {
            this.$message({
              type: 'error',
              message: '删除失败'
            })
          }
        })
      }
    }
  }
</script>

<style scoped>
  .el-form{
    margin-top: 15px;
  }
</style>
